This page has 0 threads | Add post

Exercises

Finding our exercises useful? Please consider helping us to share more!

Software ==>	SQL (129 exercises)
Topic ==>	Scalar functions (6 exercises)
Level ==>	Harder than average
Subject ==>	SQL training

Create all sorts of scalar functions in SQL to return info about Dr Who episodes from within a query

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

Before you can do this exercise, you'll need to download and unzip this file.

First (if you haven't already done so) run the script shown above to generate the Doctor Who training database.

See how many of the following functions you can create in the time left to you!

-- show all these functions working

SELECT

EpisodeId,

Title,

-- function to count number of companions for a given episode

dbo.fnNumberCompanions(EpisodeId) AS Companions,

-- function to count the number of enemies for an episode

dbo.fnNumberEnemies(EpisodeId) AS Enemies,

-- function to count the number of words (hint: use a combination

-- of LTRIM and RTRIM to remove leading and trailing spaces, then

-- REPLACE to change all spaces to empty strings and compare the

-- LEN of the string before and after this change!)

dbo.fnWords(Title) AS Words

FROM

tblEpisode

ORDER BY

Words DESC

Here's what you should see when you run the query, if you manage to create all of the functions listed:

Four episodes have 7 words each.

When (if?) you finish, optionally save your query as Too many functions.sql, then close it down.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.

You can find other training resources for the subject of this exercise here:

This page has 0 threads

Add a new post

Head office

Kingsmoor House

Railway Street

GLOSSOP

SK13 2AA

London

Landmark Offices

99 Bishopsgate

LONDON

EC2M 3XD

Manchester

Holiday Inn

25 Aytoun Street

MANCHESTER

M1 3AE

Site map

Terms & Conditions

Book any course as classroom, onsite or online training, or as one-to-one consultancy

Free resources

Paid services

Getting help

Where we are

Where you are

Online

Transparent reviews

Delivery of courses

Nicer to work with

Reliable and established

Our training courses

C#

Excel

MySQL

Power Apps

Power Automate

Power BI and DAX

Python

Report Builder

SQL

SQL Server

VBA Macros

Other training resources

Blogs

Exercises

YouTube tutorials

YouTube shorts

Test your skills

Consultancy

Courseware

Self-paced courses

Newsletters

Publications

Our training venues

London

Manchester

Across the UK

At your site

Online

Why we are different

Hundreds of published reviews

Small class sizes

Outstanding courseware

Online classroom

(Almost) no cancellations

Wise Owl trainers only

Genuine integrity

Invoices after training

30+ years of Wise Owl

Our top 100 clients

EXERCISE TOPIC

SQL EXERCISES

SQL EXERCISES

Create all sorts of scalar functions in SQL to return info about Dr Who episodes from within a query

Head office

London

Manchester